[irrlicht96]

I tried solving my model with 1000 iterations and got the residuals shown in the attached picture. How do I get the simulation to converge?

A 2D-Sketch of the model is attached.

The BC's are:
- mass flows inlet & outlet: 2e-5 kg/s
- velocity inlet: 14 m/s
- all other enclosure areas got a BC with pressure-outlet: 0 Pa

The settings for the solution:
Solver Type: Pressure-Based
Solver Time: Steady
Model: k-omega (2 eqn), SST

Mesh Quality:
- Skewness (Surface): Max = 0.605; Avg.= 0.016
- Orthogonal Quality (Cells): Max = 0.206; Avg. = 0.917
- Aspect Ratio: Max = 94.89; Avg. = 10.61

Cells with an aspect ratio above 5 are almost only in the inflation layers of the box.

The enclosure is in all directions at least 5 times the length of the box in that direction. Also, I put a Body of Influence around the box.

I am interested in the general behavior of the flow behind the box (so in front of the mass flow inlet & outlet).

I watched many CFD-Videos but am still a newbie to it.. So I think, the Quality of my mesh is good? But then I don't get why my residuals won't converge. Can anyone help me?